<!DOCTYPE html>
<html
  lang='zh-CN'
  xmlns="http://www.w3.org/1999/xhtml"
  xmlns:th="http://www.thymeleaf.org"
>
<head>
  <meta charset='UTF-8'>
  <meta
    name='viewport'
    content='width=device-width, initial-scale=1, shrink-to-fit=no'
  >
  <meta
    http-equiv='x-ua-compatible'
    content='ie=edge'
  >
  <title></title>
  <style>
    .text-center {
      text-align: center;
    }
  </style>
</head>
<body class="text-center">
<h4>这是您的登录验证码，5 分钟后将自动失效！</h4>
<h2 th:text="${code}"></h2>
</body>
</html>